package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.GetMapping;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传过来的明文密码进行md5算法加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        System.out.println(password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //实例化员工对象
        Employee employee=new Employee();

        //对象属性拷贝
        //将EmployeeDTO对象中的属性值复制到Employee对象中
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置账号状态 默认正常状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码 默认密码是123456
        //设置并使用md5算法对密码进行加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        //设置创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //设置创建人id和修改人id
        //employee.setCreateUser(BaseContext.getCurrentId()); //将ThreadLocal中的id赋值给employee中的createUser和updateUser
        //employee.setUpdateUser(BaseContext.getCurrentId());

        //保存员工信息
        employeeMapper.insert(employee);

    }

    /**
     * 分页查询员工信息
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        //调用employeeMapper 并使用Page封装
       Page<Employee> page= employeeMapper.pageQuery(employeePageQueryDTO);

       //拿到total和records
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        //返回PageResult对象
        return new PageResult(total,records);
    }

    /**
     * 修改员工状态
     * @param status
     * @param id
     */
    @Override
    public void StartOrStop(Integer status, Long id) {
        //实例化员工对象
        Employee employee=new Employee();

        //设置状态值
        employee.setStatus(status);

        //设置id
        employee.setId(id);

        //调用EmployeeMapper中的方法
        employeeMapper.update(employee);
    }


    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }


    /**
     * 修改员工
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //实例化员工对象
        Employee employee=new Employee();
        //将EmployeeDTO对象中的属性值复制到Employee对象中
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置修改时间和修改人id
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        //调用EmployeeMapper中的方法
        employeeMapper.update(employee);
    }
}
